// type annotation 类型注解
// type inference 类型推断

let count4: number;
count4 = 123;

let countInference = 123;

const one = 1;
const two = 2;

const three = one + two;

function getTotal2(one: number, two: number) {
  return one + two;
}
const total = getTotal2(1, 2);

const xjj = {
    name: 'liud',
    age: 22,
}

